[time-nuts] Re: Can the ADEV of a GPSDO output ever be lower than the minimum of the ADEV of the internal oscilator and the ADEV of the GPS PPS?

Attila Kinali attila at kinali.ch
Tue May 10 11:42:41 UTC 2022


On Tue, 10 May 2022 12:49:27 +0200
Erik Kaashoek <erik at kaashoek.com> wrote:

> Error bars like this?

Exactly...

And what you see is, that beyond ~300s the difference is not statistically
significant anymore and beyond 700s the curves are indistinguishable.

I'm a bit surprised that a TCXO (with control loop) is good enough for 100s.
Even if the difference to the PPS is only a factor of 1.6. 
That's a quite decent oscillator.

				Attila Kinali
-- 
In science if you know what you are doing you should not be doing it.
In engineering if you do not know what you are doing you should not be doing it.
        -- Richard W. Hamming, The Art of Doing Science and Engineering




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